Reza Najafi at IAEA annual meeting

Alexander Klein / AFP/Getty Images

Iran's new ambassador to the International Atomic Energy Agency, Reza Najafi, struck a more conciliatory note at the U.N. nuclear watchdog agency's annual board of directors meeting on Thursday. But analysts warn that the changes in Iran's nuclear policy since the inauguration last month of President Hassan Rouhani are more in style than substance.

Iran's new ambassador to the International Atomic Energy Agency, Reza Najafi, struck a more conciliatory note at the U.N. nuclear watchdog agency's annual board of directors meeting on Thursday. But analysts warn that the changes in Iran's nuclear policy since the inauguration last month of President Hassan Rouhani are more in style than substance. (Alexander Klein / AFP/Getty Images)

Iran's new ambassador to the International Atomic Energy Agency, Reza Najafi, struck a more conciliatory note at the U.N. nuclear watchdog agency's annual board of directors meeting on Thursday. But analysts warn that the changes in Iran's nuclear policy since the inauguration last month of President Hassan Rouhani are more in style than substance.